(a) Schematic diagram of the USTC-AG02 sensor. It includes an atom interferometer, a magnetic shield, and a 3D vibration isolator. (b) Illustration of the Raman beam collimator on top of the vacuum chamber. (c) Illustration of the retro-reflector on the bottom of the vacuum chamber. (d) The Raman beam comprises of two counter-propagation beams, with wave vectors of k₁ and k₂. Here α is the tilting angle of k₁, and β is the tilting angle of the retro-reflection mirror. The angle between k₂ and g is π – (2β – α).